Parsons, D E; Koutsourakis, G; Blakesley, J C (2024) Performance measurements for Indoor Photovoltaic Devices: Classification of a novel light source. APL Energy, 2 (1). 016110

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Abstract

There is an increasing interest in using Indoor photovoltaic (IPV) devices to power the Internet of Things (IoT) applications, low power communications and indoor environmental sensing. For the commercialisation of IPV technologies, device performance measurements need to conform to the relevant standardised specifications. We present a novel IPV device measurement system developed to deliver performance measurements under indoor standard testing conditions (ISTC), as defined in the recently published IEC TS 62607 7 2:2023, where performance measurements specifications under indoor light are defined. The system uses digital light processing (DLP) to deliver a spectrally invariant light source for measurements of IPV devices at all required illuminance levels. We evaluated the DLP system according to requirements for spectral coincidence, temporal stability, and non-uniformity at the sample plane. We demonstrate the measurements to define the classification status of the system and the unique benefits of the DLP system that allow a stable spectral profile and high levels of uniformity across all illuminance levels. This is the first reported measurement system for IPV device testing based on DLP technology, while the classification methodology of this work can be used as an example for classification of indoor light simulators in laboratory environments based on the latest IEC TS 62607 7 2:2023.

Item Type:	Article
Keywords:	photovoltaics; semiconductor; metrology; characterisation; IPV; IOT
Subjects:	Electromagnetics > Electromagnetic Materials
Divisions:	Electromagnetic & Electrochemical Technologies
Identification number/DOI:	10.1063/5.0186028
Last Modified:	23 Jul 2025 13:16
URI:	https://eprintspublications.npl.co.uk/id/eprint/10207